GitHub Discussion #2123

https://github.com/clientIO/joint/discussions/2123

by Roman Bruckner

HTML

<html>
<head>
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/jointjs/3.6.2/joint.css" />
</head>
<body>
      <!-- content -->
      <div id="paper"></div>

      <!-- dependencies -->
        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.1/jquery.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.4.0/backbone.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/jointjs/3.6.2/joint.js"></script>
    
    </body>
</html>

JavaScript

const graph = new joint.dia.Graph({}, {
  cellNamespace: joint.shapes
});

const paper = new joint.dia.Paper({
  el: document.getElementById('paper'),
  width: 800,
  height: 900,
  model: graph,
  cellViewNamespace: joint.shapes,
  gridSize: 10,
  async: true,
  sorting: joint.dia.Paper.sorting.APPROX,
});

// Example

const Link = joint.dia.Link.define('Link', {
    attrs: {
        root: {
            cursor: 'pointer'
        },
        line: {
            connection: true,
            stroke: '#333333',
            strokeWidth: 2,
            strokeLinejoin: 'round',
        },
        wrapper: {
            connection: true,
            strokeWidth: 10,
            strokeLinejoin: 'round'
        },
        targetArrowhead: {
            atConnectionRatio: 1,
            d: 'M -20 -20 2 0 -20 20 z',
            stroke: '#333',
            fill: '#fff',
            strokeWidth: 2
        }
    }
}, {
    markup: joint.util.svg`
        <path @selector="wrapper" fill="none" stroke="transparent" stroke-linecap="round"/>
        <path @selector="line" fill="none"/>
        <path @selector="targetArrowhead"/>
    `
});

const l1 = new Link({
    source: {
        x: 100, y: 100
    },
    target: {
        x: 300, y: 200
    }
});


graph.resetCells([l1]);

paper.on('link:pointerdown', function(linkView, evt) {
    console.log('arrowhead clicked');
});